Boom, my head just exploded reading these few responses to ops post.
First off, people are claiming that calling each other white, yellow, black, red etc is racist and in the same sentence they say that calling each other german, canadian or japanese is not racist because colors put people into categories, but nations do not.
How is that, if I may ask you? Both, nationalities and skin colors, are (or rather, can be) used to categorize people. As a matter of fact, in modern business, categorizing people by nationalties is absolutely common. So if by definition categorizing people is racist, why isn't everything racist that puts people into any kind of category? Social status? Racist! Different job possitions? Racist! See what I did there?
It is entirely up to the beholders eye if something I've just said is offensive and/or racist. If people would stop being so sissy about things that might offend them, the world would become a better place.
So what if I called you black? Look into a mirror... you are black! You are just as black as I am white! There is _nothing_ wrong with it and we are still equally valuable as humans.
To me, racism begins when I start to say "I am more worth of being XYZ because I am white and you are black, inferior scum". Just saying someone is black is nothing more than pointing out the obvious